Make your own LED Battery Level Indicator

Rapid prototypes ($2 for 10 PCBs 10*10cm): https://jlcpcb.com Previous video: https://youtu.be/_6QIutZfsFs Facebook: https://www.facebook.com/greatscottlab Twitter: https://twitter.com/GreatScottLab Support me for more videos: https://www.patreon.com/GreatScott?ty=h More project information (schematic, parts list, pictures,.....) on Instructables: https://www.instructables.com/id/Make-Your-Own-LED-Battery-Level-Indicator/ Parts list (incomplete, see Instructables for more, affiliate links): Amazon.com: 2x LM324: https://amzn.to/2IZA0zb 6x 10k Trimmer: https://amzn.to/2Nzt8fJ 6x 2k Resistor: https://amzn.to/2m1GG6M 6x 5mm LED: https://amzn.to/2KW3kbT 1x Boost Converter: https://amzn.to/2NzYhPV Ebay: 2x LM324: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337606358&customid=&icep_item=381374818352&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg 6x 10k Trimmer: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337606358&customid=&icep_item=182551169452&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg 6x 2k Resistor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337606358&customid=&icep_item=252838503547&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg 6x 5mm LED: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337606358&customid=&icep_item=172618155078&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg 1x Boost Converter: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337606358&customid=&icep_item=112619032791&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg In this video I will show you how we can use the classic LM3914 IC to create an LED Battery Level Indicator. Along the way I will show you how the IC works and explain why it is not the most precise circuit for a Li-Ion battery pack. And at the end I will show you how I created my own, more precise Battery Level Indicator circuit with a couple of simple components. Websites mentioned in the video: https://www.powerstream.com/p/INR18650-25R-datasheet.pdf https://www.akkuteile.de/ http://lygte-info.dk/review/batteries2012/Sony%20US18650VTC6%203000mAh%20(Green)%20UK.html https://www.akkuteile.de/lithium-ionen-akkus/18650/sony-konion-us18650vtc6-3120mah-3-6v-3-7v-flat-top-max-30a/a-100680/ Thanks to JLCPCB for sponsoring this video Visit https://jlcpcb.com to get professional PCBs for low prices Music: 2011 Lookalike by Bartlebeats Killing Time, Kevin MacLeod (incompetech.com)